CPM 20CV (M390 equivalent)
Crucible Particle Metallurgy stainless cold work steel — virtually identical to Böhler M390 and Carpenter CTS-204P. 1.9% C, 20% Cr, 4% V, 1% Mo. The highest corrosion resistance of any PM tool steel while maintaining 58–62 HRC hardness and outstanding edge retention. Considered the current benchmark for premium stainless knife steel. Also used for plastic injection mold cavities (mirror polish + corrosion resistance) and food processing cutting tools.
Mechanical properties — Pro
Annealed
| Property | Value | Unit |
|---|---|---|
| Hardness HB |
Hardened + Tempered
| Property | Value | Unit |
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| Hardness HRC |
General
| Property | Value | Unit |
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| Density |
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P20 / 40CrMnMo7
1.2311Pre-hardened plastic mold steel (usually delivered at 28-34 HRC). The most widely used mold base steel globally. Good machinability in pre-hardened condition, good polishability. Used for injection molds, die-casting dies, extrusion tooling, and structural mold components.
M2 / HS6-5-2
1.3343The most widely used high-speed steel worldwide. W-Mo-Cr-V composition gives excellent red hardness (cuts at temperatures up to 600°C). Used for twist drills, end mills, taps, reamers, bandsaw blades, and general-purpose cutting tools. The benchmark HSS grade.
X45NiCrMo4
1.2767Nickel cold-work tool steel with exceptional toughness from ~4% Ni content. Excellent through-hardenability, polishability, and impact resistance. Used for plastic injection molds (high-gloss), embossing dies, scrap shear blades, punches, cutlery dies, and bending tools.
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